ISO affects colour?

Scots_quine

Scots_quine

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This is an extract from Phototips and I have never come across this statement before. If it is true, what effect does it have on the colour or does he mean 'noise'.

'When I shoot landscapes in the morning, such as 7am when the light is breaking through, I might chose F16 and 1/125th of a second. I will chose an iso of between 100 and 400. My iso depends on the light of course. The higher the iso the more your colour will be affected.'
 
There are two types of noise; luminescent and chromatic. He's talking about the latter.
 
yeah in some cameras, i think moreso with canons you can get a colour shift as well at higher isos, the 5d mark 2 has a green shift at higher isos.
 
Scots_quine said:
This is an extract from Phototips and I have never come across this statement before. If it is true, what effect does it have on the colour or does he mean 'noise'.

'When I shoot landscapes in the morning, such as 7am when the light is breaking through, I might chose F16 and 1/125th of a second. I will chose an iso of between 100 and 400. My iso depends on the light of course. The higher the iso the more your colour will be affected.'
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I would take that with a pinch of salt. For a start, an exposure of 1/125 sec at f/16 with ISO100 will be slightly under exposed even in bright noon sun, let alone when 'the light is breaking through' at 7am.

Raising ISO increases noise, reduces dynamic range and makes darker colours less clean looking, but it doesn't change the colour balance. And having done a whole stack of tests recently from ISO 50 to ISO 102400 I can say that with some assurance.
 
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